924Board.org

[monkeyminge]

Hi guys, its the beginner here again. Got a question, may be purchasing a 924 turbo engine to replace the race engine in our current project, but was wandering if it was possible to replace the cam in the turbo, for the one in our current engine as it is a performance upgrade???

Update... Hopefully be uploading some pictures this week of how the car is going, at the minute we are welding in new plates where the previous is too rotten to replace, ie the inner arches, floor pan etc... the seemed lip around the sunroof is really rotten and is going to prove challenging to replace.

Cheers Guys

[924guy]

im a little confused in what your asking but i think what your looking is cam fitment . the turbo and the non turbo 2.0 engines use the same cam, so if your looking to swap the one from your current non turbo into a turbo engine, the answer is yes, itll work..

was the car originally a turbo? if your putting a turbo engine into a non turbo, your going to run into a few issues with electronics , torque shaft, clutch, and maybe some other differences...
_________________
Eric
78 924
82 931 SE "smokey"
99' VehiCross
Y2K Honda Insight
http://www.cardomain.com/id/924Guy
Performance by Pasha

[AznDrgn]

one thing you need to look at as far as the cams is the lift and duration. Turbo and NA setups use different profiles as far as performance goes so what may be good for one might not be so great for the other.
_________________
-'87 Jeep Cherokee 4.0L 6" of lift 33" Super Swampers

-'83 Callaway 944 2.5L turbo, 300HP, 1 of 42 ever made

[monkeyminge]

Oh right, no the previous car was a non turbo, but hopefully (fingers crossed) we are getting every part of the turbos running gear, so with that in mind what are the other problems we might encounter? best be prepared.

Thanks for the info on the cam, not sure what to do now, as i said earlier its fitted in one of lodgesports race engines which we currently have (or had) in the car. So if we place the cam in the turbo, is it possible it can have a reverse effect??

We are total beginners here, so I appreciate the help you have given to me so far

Cheers

[My924gtc]

Why are you dropping the lodgesport motor?

The cam is not going to be good for the turbo if the lift is too high and duration is to long because it will allow too much air to be forced into the chamber making things run very lean. Basically an NA requires more breathing in order to increase performance, and L&D do that. Turbos on the other hand are breathing as much as possible via forced induction.

Are you getting a 931 parts car or just the drivetrain? You are going to need the wire harness, fuel distributor, and a bunch of things to truly convert to 931 specs.

I may be interested in the NA motor if you have no plans for it. I would definitely like the cam if nothing else. You don't happen to have the profile of the cam do you?
_________________
MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06

Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands"

[monkeyminge]

Keep sending lodge sport emails, but get no response. The engine was purchased about 3 to four years ago, and as I said was only one race old after it was hit up the back and written off. Our car had a lot of stuff actually purchased from Lodge Sport including gearbox, seats etc.

Will keep trying to get the information on the engine, and if we do decide to drop it, i'll definately advertise it with you guys

Cheers

[CBass]

It really depends on the cam grind itself. Camshafts for turbocharged cars usually differ in that they have higher lift, and less duration compared to a similar NA cam.

If it is an all out race cam, such as a 300 degree advertised duration grind, you might run into serious problems with spooling the turbocharger, or even holding an idle below 2000rpm. If the advertised duration is only 270 degrees or so, and it is for a track car only, I can't imagine you'd have too many problems.

IIRC, the Carrera GT used the same camshaft as the 924/931. If Porsche didn't feel a need to change the valve timing in this tune, I don't think it's all that much of a restriction.
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'81 931 in various states of assembly

[monkeyminge]

The Turbo engine is a no go at the minute anyway, as we were out bid for it. Its looking like thats going to go on the backburner now until the car is fully rebuilt, as we were just going to store it until that time anyway.

Cheers